stiles



UNITED STATES NATHAN ULLMAN AND MARK D. STILES, OF NEW YORK, N. Y.

CRAYON COMPOUND.

. SPECIFICATION forming part of Letters Patent No. 223,869, datedJanuary 27, 1880.

Application filed December 15, 1879.

To all whom it may concern:

Be it known that we, NATHAN ULLMAN, of the city, county, and State ofNew York, and MARK D. STILEs, of the same place, have invented a new andImproved Crayon Sauce or Compound, for making crayon portraits anddrawings, which compound, together with the mode of preparation, isfully described in the following specification. 7

Our invention relates to that class of crayon sauces, compounds, ormaterials used by crayon artists; and it consists of lamp-black,alcohol, and Siberian lead, prepared in the manner and in theproportions as hereinafter set forth.

The object of our invention is to produce a crayon compound that canreadily be applied in developing a picture or drawing without injuringthe surface of the paper or material on which the picture is to be prodneed, and which can be removed and worked upon with great facilitywithout becoming either muddy, dirty, or blurred in appearance.

All other crayon compounds and materials now in use, when spread uponthe paper or material upon which the picture or drawing is to beproduced, assume a reddish tinge, which is greatly detrimental to theeffect of the picture or drawing. A crayon picture or drawing producedby our compound assumes a rich gray and transparent tone, that cannot bebrought about by the application 01' any other crayon compound ormaterial now in use. Our compound produces'all the effects requisite tomake a vigorous,and artistic picture.

Our crayon sauce or compound consists of a composition consisting oflamp-black, sixteen parts, by weight; alcohol, (ninety-five per cent.,)forty-eight parts, by weight; Siberian lead or graphite, one part, byweight.

Although we have found excellent effects resulting from this formula, wedo not limit ourselves to these proportions, as theymay be varied tomeet the individual requirements of different artists.

The process of preparing the compound is substantially as follows: Afterforming a paste of the lamp-black and alcohol, allow the alcohol toevaporate until the compound becomes thoroughly dry; then pulverize thisto a fine powder, subsequently adding Siberian lead or graphitepulverized; mix the ingredients thoroughly and subject them to a furtherpulverization, which completes the process.

The Siberian lead or graphite is introduced into the compound to enrichthe tone and facilitate its application and removal when ap-- oursignatures this 12th day of December,

NATHAN ULLMAN. MARK D. STILES.

